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I have a Cannondale CAAD12. It has a Cannondale SI crankset. The frame's bottom bracket is BB30A.

My question is, can I fit a Stages FSA BB30 Power Meter on the non drive side?

My concerns:

  • BB30A is 5mm wider than BB30. Will this affect my q-factor (lateral distance between cranks) or can I get around it by changing spacers.
  • Will the Stages FSA actually fit on the Cannondale Spindle?

UPDATE This chart suggests that I should be ok with Stages FSA BB30. Does anyone agree?

|improve this question
  • 2 questions: Are you planning to replace both sides of your crankset? Or just use the FSA non-drive side on your SI crank? And second, why do you need a new bottom bracket? – zenbike Apr 4 '17 at 0:28
  • Not planning on replacing both. I don't need a new bottom bracket. The chart shows how to convert between form factors right? I assumed the chart therefore tells me that fsa and bb30a are compatible without the need for a converter? – Gaz_Edge Apr 4 '17 at 6:25
  • That chart does not appear to say that the 2 frame standards are compatible. However, if you are only adding the LH crank arm from Stages to your SI crankset, the FSA Stages is not the correct choice. That is a matter of the spline pattern on the BB spindle, which is specific for each brand of crank. Stages does make an SI power meter. – zenbike Apr 5 '17 at 4:49
  • If you are planning on replacing both sides of the crank, then you can use an FSA crank in your frame, with an additional 5mm spacer on the non drive side. – zenbike Apr 5 '17 at 4:50
  • Thanks. Wanna write that up as the answer and I'll mark as accepted? – Gaz_Edge Apr 5 '17 at 7:02

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